Answer:
D] f(n) = f(n − 1) + (−7)
Step-by-step explanation:
since you already know is an arithmetic series, you have to find the common difference.
87 - 94 = -7
80 - 87 = -7
73 - 80 = -7
the formula for the nth term is f(n) = f(n-1) + d
where f(n-1) is the previous term and d is the common difference, so if youu substitute you get:
f(n) = f(n-1) + d
f(n) = f(n-1) + (-7)
